National Science Olympiad Forum By SOF Olympiad Trainer - Page 255

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Subject :NSO    Class : Class 7

Fill in the blanks by choosing an appropriate option.

When sugar is dissolved in water, it undergoes a (i) change but if sugar is heated in a test tube over the Bunsen burner flame, it first melts, turns brown and finally turns (ii) . The new substance formed is (iii) and the change is a (iv) change.

(i) (ii) (iii) (iv)
A Physical, reversible Black Charcoal Chemical, irreversible
B Physical, irreversible Black Coal Chemical, irreversible
C Physical, irreversible Red Charcoal Chemical, reversible
D Physical, reversible Red Coal Chemical, reversible


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Subject :NSO    Class : Class 6

Refer to the given figures of machines P, Q, R and S which represent different joints of our body. Identify the joints according to movement of these machines and select the correct option.


A P type of joint is found between the upper arm bone (humerus) and shoulder.
B Q type of joint is present in our elbow and knee and allows movement in only one plane.
C S type of joint allows side to side as well as backward and forward movement, e.g. ankle and wrist joints.
D R type of joint allows the highest freedom of motion e.g., hip joint.


A

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Class : Class 6

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Class : Class 6

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Class : Class 6

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Class : Class 8
S is meant for Gliding Joint (Wrist

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Class : Class 6

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Class : Class 6

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Class : Class 6

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Class : Class 7

Ans 9:

Class : Class 6
solution please

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Class : Class 6

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
D

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Please include about how to solve this question inyour solution. I cannot understand how to solve this question.

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Class : Class 8
actually, you have to identify the letters in between the word which come in the alphabetical sequence. i.e - o and p

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Class : Class 9
me too

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Class : Class 9
how to solve this

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
Ans Is d

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Subject :NSO    Class : Class 8

As proved by many studies greenhouse effect is rapidly increasing because of increase in concentration of carbon dioxide. In the given graph the increase in carbon dioxide concentration is shown. What could be X corresponding to it?


(i) Rate of photosynthesis in plants
(ii) pH of the oceans
(iii) Water level of ocean
(iv) Average global temperature of Earth

A (i) and (iii) only
B (ii) and (iv) only
C (ii) only
D (iv) only


There should be an option for (ii), (iii),

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Subject :NSO    Class : Class 1

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Subject :NSO    Class : Class 5

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